what does a 409 code indicate on a 5.4 triton engine

2 Answers

EGR (Exhaust Gas Recirculation) circuit "A"
fault. If you have no symptoms such as rough
idle, won't idle, stalling, or pinging it's going to
be the wiring or connector for the EGR valve. If
you have symptoms such as what I've
mentioned, it's going to be a stuck open EGR
valve. HTH. -Jim

got access to a engine 5.4 out of a wreck they just don't remember what
wreck they are wrecker service i need a 5.4 my vin on truck says i need motor
with eighth digit being a v how can i look at a ...

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